Changes between Version 1 and Version 2 of EwEugModellingEffortDynamics

Timestamp:

2010-01-31 12:06:50 (13 years ago)

Author:

varunr

Comment:

--

EwEugModellingEffortDynamics

@@ -23 +23 @@
 At each time step, a mean income per effort index ''I,,g,t,,'' is calculated as
 
-[[Image(wiki:EwEugIimages:0800003A.png)]]
+[[Image(wiki:EwEugImages:0800003A.png)]]
 
 where ''i'' = ecological species or biomass group, ''q'g,i'' is the catchability coefficient (possibly dependent on Bi) for species'' i'' by gear ''g'', and ''P,,g,i,,'' is the market price obtained per biomass of'' i'' by gear g fishers.  Also, mean fleet profit rates ''PR,,g,t,,'',,,,for fishing are calculated thus:
 
-[[Image(wiki:EwEugIimages:0800003B.png)]]
+[[Image(wiki:EwEugImages:0800003B.png)]]
 
 where ''c'',,''g'',, is the cost of a unit of fishing effort for gear g (cost and price factors are entered via the [[Definition of fleets.htm|Definition of fleets]] and [[Market price.htm|Market price]] forms). For each time step, the “fast” effort response for the next (monthly) time step is predicted by a sigmoid function of income per effort and current fleet capacity:
 
-[[Image(wiki:EwEugIimages:0800003C.png)]]
+[[Image(wiki:EwEugImages:0800003C.png)]]
 
 Here, ''I,,hg,,'' and ''p'' are fleet-specific response parameters. ''I,,hg,,'' is the income level needed for half maximum effort to be deployed and ''p'' is a “heterogeneity” parameter for fishers: high ''p'' values imply all fishers “see” income opportunity similarly, while low p values imply fishers “turn on” their effort over a wide range of mean incomes, as shown in Figure 3.12.
 
-[[Image(wiki:EwEugIimages:0300003D.png)]]
+[[Image(wiki:EwEugImages:0300003D.png)]]
 
 '''Figure 3.12''' Effect of the ‘heterogeneity’ parameter, ''p'', on effort/income function.
@@ -42 +42 @@
 For each fleet, slow effort responses are modelled as changes in fleet capacity (''K'',,''g,t'',,), which is a function of the capital depreciation rate ''ρ,,g,,'', the capital growth rate ''r'',,''g,t'',,'and profit ''PR'',,''g,t'',,. The capital growth rate is calculated via a growth factor ''gf'',,''g'',,,t, i.e.,
 
-[[Image(wiki:EwEugIimages:0800003E.png)]]
+[[Image(wiki:EwEugImages:0800003E.png)]]
 
 where ''K'',,''g,1'',,'', ρg'' and ''r'',,''g,1'',, are set by the user. The annual capacity ''K'',,''g,t'',, is then updated as
 
-[[Image(wiki:EwEugIimages:0800003F.png)]].
+[[Image(wiki:EwEugImages:0800003F.png)]].